< Topic >At least part in the water production method of the micro beads of the soluble insecticide. You put organic regent R1 in polarity liquid phase (p) in the agricultural chemical, and simultaneous as for organic regent R2 you place in the oily liquid phase (h) which consists of with the non phase solvent (S) and when agitating a kind of can make polarity liquid phase disperse (p) in oily liquid phase (h) surface active agent at least in the polarity liquid phase, compliment organic regent R condense1 and R2 heavily in these quarter-phase type liquids.< Solution method >In order for condensation polymerization to happen with the polarity liquid phase (p), organic regent R combination of1 and organic regent R2 is selected.【課題】少なくとも部分的に水に可溶な殺虫剤のミクロビーズの製造方法。有機試薬R1を農薬と一緒に極性液相(φp)中に置き、有機試薬R2は極性液相に非相溶な溶媒(S)と攪拌時に極性液相(φp)を油性液相(φh)中に分散させることができる少なくとも一種の界面活性剤とからなる油性液相(φh)中に置き、この二相系液体中で相補な有機試薬R1とR2を重縮合する。【解決方法】重縮合が極性液相(φp)で起こるように有機試薬R1および有機試薬R2の組み合わせを選択する。
